sonarqube Im currently using SonarQube version 5.6.6. better way to handle this is to store the result of method invocation in a variable. Trying to understand how to get this basic Fourier Series. . A value is checked here to see whether it is null, but this value can't be null because it was previously dereferenced and if it were null a null pointer exception would have occurred at the earlier dereference. In C# and Java, all reference types can point to null. Because a null pointer does not point to a meaningful object, an attempt to dereference(i.e., access the data stored at that memory location) a null pointer usually (but not always) causes a run-time error or immediate program crash. Agreed. The only potential null is the return value of list(). When should pointers be checked for NULL in C? There are many ways to resolve this. Could I capture, and I would be able to glean much security information from the dump? The 4gig boundary will probably be important too with unsigned int in LP64, but since size_t will be 64-bit, there will have to be some truncation that compilers will be able to warn on. This compliant solution ensures that the pointer returned by png_malloc() is not null. [RSPEC-2259] - Jira ", Eclipse - Sonar S2629 possible false positive with new String, SonarQube null pointers should not be dereferenced on try/catch, getTextContent() through "Null pointers should not be dereferenced". sonar-java. There are other problems with this code, as is noted in the rule. That's true. In this case, the difference is the assumption thatmalloc() always returns non-nullfor the second NCCE, whereas the first NCCE has themalloc() abstracted away. Here is our source code: Sign in to download full-size image This sounds indeed like a bug in the flow when an exception is raised. Then we hit memcpy with length 0. So, this code should address the Sonar problem: You can also eliminate the null check using Optional
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